2531997 has 48 divisors (see below), whose sum is σ = 4455360. Its totient is φ = 1368576.

The previous prime is 2531993. The next prime is 2532007. The reversal of 2531997 is 7991352.

2531997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2531997 - 2² = 2531993 is a prime.

It is a super-2 number, since 2×2531997² = 12822017616018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2531993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 37758 + ... + 37824.

It is an arithmetic number, because the mean of its divisors is an integer number (92820).

2^2531997 is an apocalyptic number.

It is an amenable number.

2531997 is a deficient number, since it is larger than the sum of its proper divisors (1923363).

2531997 is a wasteful number, since it uses less digits than its factorization.

2531997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 122 (or 119 counting only the distinct ones).

The product of its digits is 17010, while the sum is 36.

The square root of 2531997 is about 1591.2249998036. The cubic root of 2531997 is about 136.2974494558.

The spelling of 2531997 in words is "two million, five hundred thirty-one thousand, nine hundred ninety-seven".